Upgrade pmd version to the latest one for parsing Java 8 code successfully

[MiErnst]

Processing our source results in PMDExceptions and the file will be ignored and an ERROR will be logged by the sonar-maven-plugin.
Example code which fails:
Collections::<String> emptyList

net.sourceforge.pmd.PMDException: Error while parsing ...
Caused by: net.sourceforge.pmd.lang.java.ast.ParseException: Encountered " "::" ":: "" at line 68, column 59.
Was expecting one of:
    ")" ...
    "," ...
    "++" ...
    "--" ...

By upgrading the plugin dependency the problem is solved:

<plugin>
   <groupId>org.sonarsource.scanner.maven</groupId>
   <artifactId>sonar-maven-plugin</artifactId>
   <version>3.2</version>
   <dependencies>
      <dependency>
         <groupId>net.sourceforge.pmd</groupId>
         <artifactId>pmd-java</artifactId>
         <version>5.5.3</version>
      </dependency>
   </dependencies>
</plugin>

The sonar-maven-plugin still logs :

[INFO] Sensor PmdSensor
[INFO] Execute PMD 5.4.2...